Sealing surface free-grinding repairing method of slurry valve

A repair method and sealing surface technology, which is applied in the repair field of valves, can solve problems such as alumina slurry deposition, affecting valve performance, and valve unusability, and achieves the effect of a simple method

Active Publication Date: 2011-01-26
杭州耐特阀门股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(Ordinary alumina slurry) As long as it is used, the internal alumina slurry deposits and scars, especially the alumina slurry deposits and scars on the sealing surface of the valve, which will seriously affect the performance of the valve, and even make the valve Not available

Method used

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  • Sealing surface free-grinding repairing method of slurry valve
  • Sealing surface free-grinding repairing method of slurry valve
  • Sealing surface free-grinding repairing method of slurry valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Shown in embodiment 1 is the handwheel transmission valve, and its grinding repair method is:

[0026] 1) Remove the guide plate fixing screw 5, turn the guide plate 1 to the left (direction indicated by arrow A), and make the guide rib on the guide plate separate from the guide groove on the anti-rotation plate 2.

[0027] 2) Loosen the lock nut on the stem nut 7 and set screw 6, and tighten the screw 6 to lock the stem nut.

[0028] 3) Turn the hand wheel 10 to make the valve disc contact with the valve seat, and pay attention to the contact pressure between the valve disc and the valve seat should be controlled at an appropriate level (too large contact pressure will cause the grinding not to be brisk, or even unable to grind; if the contact pressure is too small , resulting in low grinding efficiency).

[0029] 4) Tighten the valve stem lock nut 9 so that the valve stem and the valve stem nut 7 are tightly fixed to each other (they will not rotate freely).

[0030...

Embodiment 2

[0035] Shown in Example 2 is a gear drive valve whose grinding repair method is:

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Abstract

The invention relates to a repairing method of a valve, in particular to a sealing surface repairing method of a slurry valve. Aiming to provide the sealing surface repairing method of the valve, the valve on a process pipeline can be directly repaired without influencing production, and the repairing method has the characteristics of simplicity and low cost without dismantling the valve. The technical scheme comprises the following steps of: (1) cutting a transmission chain of an anti-rotating mechanism of a valve and a valve rod to ensure that the valve rod is provided with the freedom degree of rotating around an axis thereof and linearly moving along the axis thereof; and (2) pushing the valve rod to ensure that a valve flap at the front end of the valve rod is pressed on a valve seat, then rotating the valve rod to ensure that the valve flap rotates around the axis of the valve rod, and grinding between the sealing surface of the valve flap and the sealing surface of the valve seat until sediments and scarring objects on the sealing surface of the valve flap and the sealing surface of the valve seat are eliminated.

Description

technical field [0001] The invention relates to a method for repairing a valve, in particular to a method for repairing the sealing surface of a slurry valve. Background technique [0002] As we all know, when the alumina slurry flows through the valve, it is very easy to produce deposits and scars inside the valve, which seriously affects the performance of the valve. Especially the alumina slurry deposited and scarred on the sealing surface of the valve will make the valve unable to be sealed and used. Although the deposition and scarring of alumina slurry in the valve have been minimized in terms of design and manufacturing technology and the materials used, deposition and scarring still occur. (Ordinary alumina slurry) As long as it is used, the deposition and scarring of the alumina slurry inside it, especially the deposition and scarring of the alumina slurry on the sealing surface of the valve, will seriously affect the performance of the valve, and even make the val...

Claims

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Application Information

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IPC IPC(8): B24B1/00
Inventor 张孝方
Owner 杭州耐特阀门股份有限公司
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